有个不必现错误，预览初步完成

core_support/urldatabase/urldatabase.cpp

@@ -0,0 +1,217 @@
+#include "urldatabase.h"
+
+ImageUrlDatabase::ImageUrlDatabase(QObject *parent) : QObject(parent)
+{
+}
+
+ImageUrlDatabase::~ImageUrlDatabase()
+{
+    if (m_db.isOpen()) {
+        m_db.close();
+    }
+}
+
+bool ImageUrlDatabase::openDatabase(const QString &path)
+{
+    m_db = QSqlDatabase::addDatabase("QSQLITE");
+    m_db.setDatabaseName(path);
+
+    if (!m_db.open()) {
+        qWarning() << "Failed to open database:" << m_db.lastError().text();
+        return false;
+    }
+
+    // 创建表结构
+    QSqlQuery query;
+
+    // 创建用户表
+    if (!query.exec("CREATE TABLE IF NOT EXISTS users ("
+                    "user_id INTEGER PRIMARY KEY AUTOINCREMENT, "
+                    "username TEXT NOT NULL UNIQUE, "
+                    "created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP)")) {
+        qWarning() << "Failed to create users table:" << query.lastError().text();
+        return false;
+    }
+
+    // 创建服务器表
+    if (!query.exec("CREATE TABLE IF NOT EXISTS servers ("
+                    "server_id INTEGER PRIMARY KEY AUTOINCREMENT, "
+                    "domain TEXT NOT NULL UNIQUE, "
+                    "created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP)")) {
+        qWarning() << "Failed to create servers table:" << query.lastError().text();
+        return false;
+    }
+
+    // 创建图片URL表
+    if (!query.exec("CREATE TABLE IF NOT EXISTS image_urls ("
+                    "url_id INTEGER PRIMARY KEY AUTOINCREMENT, "
+                    "user_id INTEGER NOT NULL, "
+                    "server_id INTEGER NOT NULL, "
+                    "image_url TEXT NOT NULL, "
+                    "last_accessed TIMESTAMP, "
+                    "created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, "
+                    "FOREIGN KEY (user_id) REFERENCES users(user_id), "
+                    "FOREIGN KEY (server_id) REFERENCES servers(server_id), "
+                    "UNIQUE(user_id, server_id, image_url))")) {
+        qWarning() << "Failed to create image_urls table:" << query.lastError().text();
+        return false;
+    }
+
+    // 创建索引
+    query.exec("CREATE INDEX IF NOT EXISTS idx_image_user ON image_urls(user_id)");
+    query.exec("CREATE INDEX IF NOT EXISTS idx_image_server ON image_urls(server_id)");
+
+    return true;
+}
+
+int ImageUrlDatabase::addUser(const QString &username)
+{
+    QSqlQuery query;
+    query.prepare("INSERT OR IGNORE INTO users (username) VALUES (?)");
+    query.addBindValue(username);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to add user:" << query.lastError().text();
+        return -1;
+    }
+
+    // 获取用户ID
+    return getUserId(username);
+}
+
+int ImageUrlDatabase::getUserId(const QString &username)
+{
+    QSqlQuery query;
+    query.prepare("SELECT user_id FROM users WHERE username = ?");
+    query.addBindValue(username);
+
+    if (!query.exec() || !query.next()) {
+        return -1;
+    }
+
+    return query.value(0).toInt();
+}
+
+int ImageUrlDatabase::addServer(const QString &domain)
+{
+    QSqlQuery query;
+    query.prepare("INSERT OR IGNORE INTO servers (domain) VALUES (?)");
+    query.addBindValue(domain);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to add server:" << query.lastError().text();
+        return -1;
+    }
+
+    // 获取服务器ID
+    return getServerId(domain);
+}
+
+int ImageUrlDatabase::getServerId(const QString &domain)
+{
+    QSqlQuery query;
+    query.prepare("SELECT server_id FROM servers WHERE domain = ?");
+    query.addBindValue(domain);
+
+    if (!query.exec() || !query.next()) {
+        return -1;
+    }
+
+    return query.value(0).toInt();
+}
+
+bool ImageUrlDatabase::addImageUrl(const QString &username, const QString &domain, const QString &imageUrl)
+{
+    int userId = addUser(username);
+    if (userId == -1) return false;
+
+    int serverId = addServer(domain);
+    if (serverId == -1) return false;
+
+    QSqlQuery query;
+    query.prepare("INSERT OR REPLACE INTO image_urls (user_id, server_id, image_url, last_accessed) "
+                  "VALUES (?, ?, ?, datetime('now'))");
+    query.addBindValue(userId);
+    query.addBindValue(serverId);
+    query.addBindValue(imageUrl);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to add image URL:" << query.lastError().text();
+        return false;
+    }
+
+    return true;
+}
+
+QList<QString> ImageUrlDatabase::getUserImages(const QString &username)
+{
+    QList<QString> result;
+    int userId = getUserId(username);
+
+    if (userId == -1) return result;
+
+    QSqlQuery query;
+    query.prepare("SELECT i.image_url FROM image_urls i "
+                  "WHERE i.user_id = ? "
+                  "ORDER BY i.last_accessed DESC");
+    query.addBindValue(userId);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to get user images:" << query.lastError().text();
+        return result;
+    }
+
+    while (query.next()) {
+        result.append(query.value(0).toString());
+    }
+
+    return result;
+}
+
+QList<QString> ImageUrlDatabase::getServerImages(const QString &domain)
+{
+    QList<QString> result;
+    int serverId = getServerId(domain);
+
+    if (serverId == -1) return result;
+
+    QSqlQuery query;
+    query.prepare("SELECT i.image_url FROM image_urls i "
+                  "WHERE i.server_id = ? "
+                  "ORDER BY i.last_accessed DESC");
+    query.addBindValue(serverId);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to get server images:" << query.lastError().text();
+        return result;
+    }
+
+    while (query.next()) {
+        result.append(query.value(0).toString());
+    }
+
+    return result;
+}
+
+bool ImageUrlDatabase::updateLastAccessed(const QString &username, const QString &domain, const QString &imageUrl)
+{
+    int userId = getUserId(username);
+    if (userId == -1) return false;
+
+    int serverId = getServerId(domain);
+    if (serverId == -1) return false;
+
+    QSqlQuery query;
+    query.prepare("UPDATE image_urls SET last_accessed = datetime('now') "
+                  "WHERE user_id = ? AND server_id = ? AND image_url = ?");
+    query.addBindValue(userId);
+    query.addBindValue(serverId);
+    query.addBindValue(imageUrl);
+
+    if (!query.exec()) {
+        qWarning() << "Failed to update last accessed time:" << query.lastError().text();
+        return false;
+    }
+
+    return query.numRowsAffected() > 0;
+}

core_support/urldatabase/urldatabase.h

@@ -0,0 +1,39 @@
+#ifndef URLDATABASE_H
+#define URLDATABASE_H
+
+#include <QObject>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QSqlError>
+#include <QDateTime>
+
+class ImageUrlDatabase : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ImageUrlDatabase(QObject *parent = nullptr);
+    ~ImageUrlDatabase();
+
+    bool openDatabase(const QString &path);
+
+    // 用户操作
+    int addUser(const QString &username);
+
+    // 服务器操作
+    int addServer(const QString &domain);
+
+    // 图片URL操作
+    bool addImageUrl(const QString &username, const QString &domain, const QString &imageUrl);
+    QList<QString> getUserImages(const QString &username);
+    QList<QString> getServerImages(const QString &domain);
+    bool updateLastAccessed(const QString &username, const QString &domain, const QString &imageUrl);
+
+private:
+    QSqlDatabase m_db;
+
+    // 内部辅助方法
+    int getUserId(const QString &username);
+    int getServerId(const QString &domain);
+};
+
+#endif // URLDATABASE_H

core_support/urldatabase/urldatabase.pri

@@ -0,0 +1,5 @@
+HEADERS += \
+    $$PWD/urldatabase.h
+
+SOURCES += \
+    $$PWD/urldatabase.cpp